Frequencies for first 10,000 rows of atst_typ variable in person dataset :

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,744       57.44       57.44
          1 |      3,158       31.58       89.02
          2 |        182        1.82       90.84
          3 |         15        0.15       90.99
          4 |         27        0.27       91.26
          5 |         17        0.17       91.43
          6 |          1        0.01       91.44
          7 |          3        0.03       91.47
          8 |         22        0.22       91.69
          9 |        831        8.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016